Turbine-wheel.



No. 873,844. f PATENTED DBC. l0, 1907. W. D. BOYGE 6a H. GUBLS.

TURBINE WHEEL.-

APPLIGATION FILED 0GT.2, 1907.

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UNITED sTATEs PATENT oEEIoE.

WILLIAM D. BOYCE AND HERMAN GUELS, OF S'I`. LOUIS, MISSOURI; SAID GUELS ASSIGNOR TO l A SAID BOYCE.

TURBINE-WHEEL.

UNO. 873,344.;

' Specicationof Letters Patent.

Patented nee. 1o, 1967. f

Application filed October Z. 1907. Serial No. 395.647.

`ful Improvement in Turbine-Wheels, of

which the following' is a full, clear, and exact description, such as will enable others skilled in the art to which it ap ertains to make and use the same, reference eing had to the accompanying drawings, forming part of this specification, in which-v Fi4 e 1 is a side elevation of a turbin wheuermbodying the features of ourlinvention, one-haltI of the buckets or blades being omitted to show more clearly the shape of the slots in the body portion 'of the wheel in which the shanks of the blades are mounted; Fig. 2 is a cross sectional view of the wheel shown in Fig. 1; 3 is an enlarged detail sectional view` showing the manner in which the blades are connected to the body portion of the wheel; Fi 4 is a cross sectional view taken on the e 4 4 of Fig. 3; and Fig. 5 is an `enlarged perspective Aviewl of one of the bladesor buckets.

This invention relates to turbines, and

articularly to the rotating member or 1bducket wheel of such engines.

The main object of our invention is to provide a turbine .wheel in which the radially pro'ecting buckets or blades are so formed andl are connected to th'e body portion of the wheel in such a manner that thereis nolpossilbility of the blades becoming bent or disp ace Referring to the drawings which illustrate the preferred form Vof our invention, 1 designates the body portion of the wheel, and 2 the radially projecting blades or buckets that are secured to the edge portion thereof. The edge portion of the body of the wheel is provided with radially disposed slots, -eachv of which has a widenedportion 3 intermediate its inner and outer ends, the side walls of the outer end portion of' said slotbeing linclined or flared outwardly from the widened portion 3, as shown clearly in Figs. 1 and 3, and the side Walls and base of the inner end of the slot being straight. The blades or buckets 2 are provided at their inner ends with Shanks that t in the radiallydisposed slots in thebody portion of the wheel and the' inner end portion 4 of each shank is of rec- 55 tangular-shape in cross section, Ias shown in 5, so that it will fit snugly in the 'inner l en oi. the slot in which it is arranged. At

' approximately. the middle of the shank is a bulbfror enlarged portion 5 which corresponds in shape to the widened portion 3 ofthe slot inthe wheel, andthe portion 6 of the shank "between said enlarged ortion 5 and the base of the bucket or bla e is wedge-shapedso that it will fit snugly in the ilared outer end of the slot. By constructing the shanks of the buckets in this manner we produce a `bucket which cannot possibly bend at its base or innerend as the cross section'ofthe metal in the wedge-shaped portion 6 of the shank is equal to the cross section ofv the metal'in the bucket proper. In other words, we have produced a bucket or blade that is strongest at the point where it is most apt to bend; namely, at the junction between the blade proper and its attaching shank. Consequently, it is not necessary to connecty the outer ends of the buckets or blades together to prevent them from bending so that the motive fluid can escape readily after it has l expended its energy.

The` body portion of the wheel can be formed by a ysingle forging if so desired but we prefer to form the hub of the wheel-from separate pieces 1a that are secured to the opposite side faces of the body 'portion 1, as shown in Fig. 2. In this way we are enabled to use a piece of steel latefor the body portion of the Wheel so t at the Acost of manufacture is much less than if a single for ing were used. Itis immaterial, however, ow the body portion of the wheel is formed so that we do not wish it .tobe understood that `our invention is limited tothe exactg-construction hereinl shown.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is: 1. A turbine wheel com rising a body or? tion provided with radiaIly disposed s ots, and radially projecting blades or, buckets havin attachin Shanks thatflt snugly in said s ots, each 'o said Shanks being providedl intermediate its end and the base of the. bucket With an enlar ed ortion that fits in a widened portion of t 1e slbt locatedbetween the inner and outerend of the slot; substantially as described. f

y2.1K turbine wheel comprising a member provided in its edge ortion withradially di'sf` posed slots and ra ially projecting'buckets' or `blades having attaching shanks that it snugly in said slots, the portion of each shank at the -base of the bucket being Wedge-shaped.

having radially disposed slots formed in its edge portion, the outer ends of said slots being flared and merging into a widened portion that is located intermediate the inner and outer ends of the slots, jecting blades or buckets `Shanks that conform in cross shape of the Yslots in said member; substantially as described.

In testimony whereof We hereunto a'llix our signatures in the presence of two Witnesses, this 28th day of September, 1907 WILLIAM D. BOYCE. HERMAN GUELS.

and radially proprovided with Witnesses:

WELLs L. CHURCH, GEORGE BAKEWELL.

section to the 

